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(No Model.) Y A T.. H. COST-ELLO 8v A. H. HALL.

ADJUSTABLE STOP HINGE. No. 269,562. Patented Dec. 26, 1882.

IIIIIIIIIIL w ITNE 5 s E 5 UNTTED STATES PATENT Ormea.

THOMAS H. COSTELLO AND ARTHUR H. HALL, OF CHICAGO, ILLINOIS, ASSIGNORS TO`A. H. ANDREWS Sr CO., OF .SAME PLACE.

-ADJUSTABLE STOP-HINGE.

SPECIFICATION forming part of Letters Patent No. 269,562, dated December 26, 1882.

' Application filed September 17, 1880. (No model.)

10 all whonm't may concern Be it known that we, THOMAS H. COSTELLO and ARTHUR H. HALL, of Chicago, in the county of Cook and State otl Illinois, have in vented certain new and useful Improvements in Adjustable Stop-Hinges for Desks, &c., of which the following is a specification.

The object of our invention is to provide a hinge for the lids of desks, so constructed that the lid can be automatically supported or locked in one or more positions, as may be desired, as it is raised, and when it has been elevated, to a certain point can be returned to its'normal position without obstruction.

The invention is intended more especially.

. purpose to more fully protect the invention therein disclosed by the present application, which is a division ot" the application upon which said patent was granted.

In the accompanying drawings, Figure 1 is a side elevation of the improved hinge. Fig. 2 is an edge View, partly in section. Fig. 3 is a detail view, showing different positions ofthe parts ofthe hinge in dotted lines. Fig. LLis a view of the inner face ofthe lid-arm or Inovable part ofthe hinge; and Fig. 5 is a detached view of the locking-bolt or sliding tumbler'.

The stationary part A of the hinge is to be secured to the standard or body of the desk. lt is provided with a transverse recess, E, which is dovetailed for the reception of the sliding bolt D,"a`s shown in Fig. 2. This bolt has an Velongated slot, d, at 4its center, through which the bolt or pivotal pin e, that unites the stationary part A and movable or swinging part B of the hinge, passes.

Ihe inner face ot' the lid-arm or movable part B is provided with two lugs or shoulders, c b, on opposite sides ofthe central bearing, h, and in a vertical line, or thereabout, when the end B' is in the position shown in Fig.2that is, when the two parts ot' the hinge are parallel.

The locking boltortumbler D is formed with Y an irregular track or depression, D', in which the lugs on the part B Work, as will presently be described, and the wall ot' which is notched or shouldered at y y', as shown in Fig. et.

a is a projecting lug, curved, as shown, on the side toward the notches y y; and t is a rib, against which the lugs b c strike.

When the parts ot' the hinge have been assembled, as shown in Fig. 2, the lug b on the part B will rest against the left ot the rib t, Fig. 5, and the lug c will be in the upper part of the track D in the locking-bolt. normal position ot' the hinge when the lid is down. NVhen the lid-arm B is raised, as shown in Fig. 1, the lug b will strike vagainst the curved or sloping side ofthe projection a and move the tumbler so far to the right that the shoulder g/ will be immediately under the lug I). Now, if the motion of the lid is reversed, so as to let the part vB down, the lug b willstrike the shoulder y and automatically lock the lid in position; and so, in like manner, if the part B is again raised, the tumbler will be driven still farther to the right by the lug b, and the second shoulder, ly,will be brought undcrit and lock the lid in another position. When the lid is raised to a given point, however, the lug c willstrike the rib or projection tand drive the tumbler back to the left, so that upon bringing the lid-arm or part B down the lug I) will pass down to the right ot' the projection a, Fig. 5, to the rib t,and restore the hingetoits normal position. The movements ofthe sliding tumbler are limited by its elongated slot. But two notches y y are shown; but obviously any desirednuin ber m ay be used,and the luga shaped to suit them.

Having fully described our invention, what we claim is L 1. The combination of the stationary part ot' the hinge, the movable or -swinging part, a pivotgpin connecting them, and an automatic locking-bolt mounted between them around and loosely upon the pivot.

2. The combination ofthe stationary part of a hinge having a recess therein, a locking-bolt moving within `said recess, and the pivoted swinging part of the hinge having shoulders thereon, which operate the reciprocating or moving bolt and automatically lock the movable part of the hinge in an elevated position.

3. Thecombinatiou ofthestationary recessed This is the part of the hinge, a reciprocating locking-bolt moving in the recess, and the shoulders on opposite sides of the bearing of the movable part, which shoulders move the locking-bolt to automatically lock the movable part of the hinge in an elevated position and then restore the said bolt to its normal position.

4. The combination., with the movable or reciprocating' bolt mounted inthe stationary part ot' a tleslehinge, ot' the pivoted lid arm having a stud to move the holt froma locked to an unlocked position as the arm rises above its operative position.

5. The combination ofthe stationary part ot' the hinge having a recess therein, the shonll dered locking-bolt moving in said recess, and having an elongated slot or opening therein, the pivoted lid-arm having` shoulders which operate the lockingbolt, and the pivot -pin which connects the parts.

(i. The combination ot' a desk standard, a swinging arm, a pivot-pin connecting the stand ard and arm, and an automatic lockingbolt mounted between the arm and standard around i and looselT upon the pivot.

THOS. H. COSTELLO. ARTHUR H. HALL. Witnesses:

T. H. OAVANAUGH, R. C. ELLIOTT. 

